| Country: | IRL |
| Type: | R |
| Route: | 635 |
| Length Km: | 4.6 |
| Terminus A: | N20 at Moire McSwiney Bridge, Cork |
| Junction: | |
| Terminus B: | N8 at Lower Glanmire Road, Cork |
| Previous Type: | R |
| Previous Route: | 634 |
| Next Type: | R |
| Next Route: | 637 |
The R635 road, the Cork Northern Ring Road, is a regional road in County Cork, Ireland. It travels from the N20 road in Blackpool to the N8, via Mayfield. The road is 4.6km (02.9miles) long.